A 1-V, 1.3-mW mixer for MB-OFDM UWB receivers by 0.18-μm CMOS technology

This paper presents a low-voltage low-power down-conversion mixer for 0.5~11 GHz, MB-OFDM UWB applications. The mixer operation is simulated in TSMC 0.18-μm CMOS process. To decrease supply voltage and power consumption, the RF and LO stages are merged together into one stage, so that the RF and LO signals apply to the source and gate of the devices, respectively while the IF output signals is produced from the drain. The mixer features a maximum conversion gain of 7.8 dB in 5.8 GHz, a low dc power consumption of 1.3mW, a DSB noise figure of 16.4 dB, an IP_1dB of -10 dBm and an input IP3 of 4dBm. The 3-dB RF bandwidth is from 0.5 to 11 GHz with an IF frequency of 100 MHz. The mixer draws 1.3 mA from a power supply of 1 V leading to a low-power operation.